Awww man it was all happy till the end I know that feeling though, my grandfather died in my arms.... it's never going to go away, but the biggest thing I would recommend is have some forms of closure with her. This next little while don't try be tough. If you feel like crying, bawl like a baby.

It sucks having something like that happen. I don't know if it means much, but I'll be praying for you and your family these next few days!
Good luck with everything, and if you need a random stranger to talk with feel free to pm me!